PHIL 252 — Unit 9: Emotions, Generalizations, and Justification
This unit completes the informal fallacy curriculum. Three chapters, three families, thirteen named fallacies total. The unifying theme: good reasoning requires fair characterization of the opposing view, proper use of generalizations, and keeping the focus on the argument rather than personal characteristics.
Learning Outcomes
By the end of Unit 9 you should be able to:
- Identify when emotions, character, and past actions are being used to argue — and explain why this is inappropriate
- Identify generalizations that violate special conditions (sweeping and hasty)
- Define circularity and relate it to the definition of a cogent argument
- Explain the importance of fair characterization for proper argumentation
Chapter 15 — Fallacies of Emotional Bias
All seven fallacies violate the relevance condition — the emotional or personal information invoked is not relevant to evaluating the cogency of the argument.
| Fallacy | Core Error | Alias |
|---|---|---|
| Ad Hominem: Abuse | Name-calling; directs attention to the person | Personal attack |
| Ad Hominem: Poisoning the Well | Attacks the person’s motivations, not their argument | — |
| Ad Hominem: Tu Quoque | Points to the person’s past behaviour as incompatible with their argument | ”Look who’s talking” |
| Mob Appeal | Sways belief with group identity, flattery, or theatrical language | Argumentum ad populum |
| Appeal to Pity | Evokes sympathy/compassion as a reason for assent | Argumentum ad misericordiam |
| Appeal to Force/Fear | Uses threats to force acceptance of a conclusion | Argumentum ad baculum |
| Two Wrongs Make a Right | Justifies behaviour by claiming the opponent would do the same | — |
Key principle: We adopt a technique of divorcing the speaker from their claims — evaluate claims directly (Are the premises true? Is the argument valid? Are there unstated assumptions?). Threats and pity are not rationally connected to the cogency of an argument.
Chapter 18 — Fallacies of Presumption
All three embed hidden, unproven assumptions that give the impression of valid arguments.
| Fallacy | Core Error | Direction |
|---|---|---|
| Sweeping Generalization | Applies a general rule to a case where a special circumstance blocks it | Rule → Case (blocked) |
| Hasty Generalization | Draws a general rule from a special, unrepresentative case | Case → Rule (premature) |
| Bifurcation | Presents only two options when more alternatives exist; confuses contraries with contradictories | False either-or |
Key distinction:
- A generalization = statement about all or most members of a class
- Rules have boundary conditions — circumstances where the rule doesn’t apply
- Sweeping generalizes past a boundary condition; hasty creates a rule from an exceptional case
- Bifurcation: contradictories (one must be T, one must be F) vs. contraries (can both be F)
Chapter 19 — Fallacies of Evading the Facts
All five appear to engage with the issue but actually evade it.
| Fallacy | Core Error | What’s evaded |
|---|---|---|
| Straw Person | Distorts opponent’s view into an easy target | The actual argument |
| Begging the Question | Conclusion smuggled into premises — circular | Independent support |
| Question-Begging Epithets | Slanted/loaded language implies the conclusion before proving it | Actual evidence |
| Complex Question | Trick question presupposes what it should be asking about | The question itself |
| Special Pleading | Double standard — loaded terms for others, neutral for self | Objective description |
Straw Person antidote: the Principle of Charity — assume the strongest version of the opponent’s argument; ask “would they endorse the view I’m attributing to them?”
Begging the question / circularity: An argument can be valid and even sound and still beg the question. “Rome is the capital of Italy, therefore Rome is the capital of Italy” is valid and sound — but gives no reason for belief. Cogent arguments require dialectically acceptable premises: they must be independent of the conclusion.
Fallacy Map — Unit 9
mindmap root((Unit 9 Fallacies)) Emotional Bias Ch.15 Ad Hominem Abuse Poisoning the Well Tu Quoque Mob Appeal Appeal to Pity Appeal to Force or Fear Two Wrongs Make a Right Presumption Ch.18 Sweeping Generalization Hasty Generalization Bifurcation Evading the Facts Ch.19 Straw Person Begging the Question Question-Begging Epithets Complex Question Special Pleading
(diagram saved)
Cross-References
- Full detail on each family: FallaciesOfEmotionalBias · FallaciesOfPresumption · FallaciesOfEvadingTheFacts
- Parent page: InformalFallacies
- Units 6 & 7 fallacies: FallaciesOfAmbiguity · FalseCause
- Connected concepts: Cogency · Argument · Bias
- Writing cross-link: RhetoricalAppeals — pathos/logos/ethos as fallacy boundaries